MDCAT Preparation MCQs
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in MDCAT
Answer: Critical angle = sin-1(1/1.5) = 41.8 degrees.
Answer: Resolving power depends on wavelength and numerical aperture.
Answer: TIR occurs from denser to rarer medium when angle exceeds critical angle.
Answer: Red light has the longest wavelength (~700 nm) in visible light.
Answer: P = 1/f = 1/0.25 = 4 diopters.
Answer: Ohm\'s Law: voltage equals current times resistance.
Answer: Fringe width = lambda D/d where D is screen distance, d is slit separation.
Answer: Myopia is corrected with a concave diverging lens.
Answer: v = c/n = 3x10^8/1.5 = 2x10^8 m/s.
Answer: Solar radiation pressure pushes the comet\'s tail away from the Sun.
Answer: Loudness is determined by the amplitude of the sound wave.
Answer: Only transverse waves can be polarized.
Answer: Light travels at maximum speed (3x10^8 m/s) in vacuum.
Answer: Rainbows form from refraction, dispersion, and internal reflection in water droplets.
Answer: Concave mirrors form both real and virtual images.
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Lens formula is:
Answer: Lens formula: 1/f = 1/v + 1/u.
Answer: Young\'s experiment proves wave nature of light through interference.
Answer: Convex mirrors provide a wider field of view.
Answer: Convex lens forms virtual enlarged image between F and the lens.
Answer: Refractive index n = c/v, speed in vacuum over speed in medium.